xref: /openbmc/linux/lib/zstd/common/huf.h (revision 7ae9fb1b7ecbb5d85d07857943f677fd1a559b18)
1  /* ******************************************************************
2   * huff0 huffman codec,
3   * part of Finite State Entropy library
4   * Copyright (c) Yann Collet, Facebook, Inc.
5   *
6   * You can contact the author at :
7   * - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
8   *
9   * This source code is licensed under both the BSD-style license (found in the
10   * LICENSE file in the root directory of this source tree) and the GPLv2 (found
11   * in the COPYING file in the root directory of this source tree).
12   * You may select, at your option, one of the above-listed licenses.
13  ****************************************************************** */
14  
15  
16  #ifndef HUF_H_298734234
17  #define HUF_H_298734234
18  
19  /* *** Dependencies *** */
20  #include "zstd_deps.h"    /* size_t */
21  
22  
23  /* *** library symbols visibility *** */
24  /* Note : when linking with -fvisibility=hidden on gcc, or by default on Visual,
25   *        HUF symbols remain "private" (internal symbols for library only).
26   *        Set macro FSE_DLL_EXPORT to 1 if you want HUF symbols visible on DLL interface */
27  #if defined(FSE_DLL_EXPORT) && (FSE_DLL_EXPORT==1) && defined(__GNUC__) && (__GNUC__ >= 4)
28  #  define HUF_PUBLIC_API __attribute__ ((visibility ("default")))
29  #elif defined(FSE_DLL_EXPORT) && (FSE_DLL_EXPORT==1)   /* Visual expected */
30  #  define HUF_PUBLIC_API __declspec(dllexport)
31  #elif defined(FSE_DLL_IMPORT) && (FSE_DLL_IMPORT==1)
32  #  define HUF_PUBLIC_API __declspec(dllimport)  /* not required, just to generate faster code (saves a function pointer load from IAT and an indirect jump) */
33  #else
34  #  define HUF_PUBLIC_API
35  #endif
36  
37  
38  /* ========================== */
39  /* ***  simple functions  *** */
40  /* ========================== */
41  
42  /* HUF_compress() :
43   *  Compress content from buffer 'src', of size 'srcSize', into buffer 'dst'.
44   * 'dst' buffer must be already allocated.
45   *  Compression runs faster if `dstCapacity` >= HUF_compressBound(srcSize).
46   * `srcSize` must be <= `HUF_BLOCKSIZE_MAX` == 128 KB.
47   * @return : size of compressed data (<= `dstCapacity`).
48   *  Special values : if return == 0, srcData is not compressible => Nothing is stored within dst !!!
49   *                   if HUF_isError(return), compression failed (more details using HUF_getErrorName())
50   */
51  HUF_PUBLIC_API size_t HUF_compress(void* dst, size_t dstCapacity,
52                               const void* src, size_t srcSize);
53  
54  /* HUF_decompress() :
55   *  Decompress HUF data from buffer 'cSrc', of size 'cSrcSize',
56   *  into already allocated buffer 'dst', of minimum size 'dstSize'.
57   * `originalSize` : **must** be the ***exact*** size of original (uncompressed) data.
58   *  Note : in contrast with FSE, HUF_decompress can regenerate
59   *         RLE (cSrcSize==1) and uncompressed (cSrcSize==dstSize) data,
60   *         because it knows size to regenerate (originalSize).
61   * @return : size of regenerated data (== originalSize),
62   *           or an error code, which can be tested using HUF_isError()
63   */
64  HUF_PUBLIC_API size_t HUF_decompress(void* dst,  size_t originalSize,
65                                 const void* cSrc, size_t cSrcSize);
66  
67  
68  /* ***   Tool functions *** */
69  #define HUF_BLOCKSIZE_MAX (128 * 1024)                  /*< maximum input size for a single block compressed with HUF_compress */
70  HUF_PUBLIC_API size_t HUF_compressBound(size_t size);   /*< maximum compressed size (worst case) */
71  
72  /* Error Management */
73  HUF_PUBLIC_API unsigned    HUF_isError(size_t code);       /*< tells if a return value is an error code */
74  HUF_PUBLIC_API const char* HUF_getErrorName(size_t code);  /*< provides error code string (useful for debugging) */
75  
76  
77  /* ***   Advanced function   *** */
78  
79  /* HUF_compress2() :
80   *  Same as HUF_compress(), but offers control over `maxSymbolValue` and `tableLog`.
81   * `maxSymbolValue` must be <= HUF_SYMBOLVALUE_MAX .
82   * `tableLog` must be `<= HUF_TABLELOG_MAX` . */
83  HUF_PUBLIC_API size_t HUF_compress2 (void* dst, size_t dstCapacity,
84                                 const void* src, size_t srcSize,
85                                 unsigned maxSymbolValue, unsigned tableLog);
86  
87  /* HUF_compress4X_wksp() :
88   *  Same as HUF_compress2(), but uses externally allocated `workSpace`.
89   * `workspace` must be at least as large as HUF_WORKSPACE_SIZE */
90  #define HUF_WORKSPACE_SIZE ((8 << 10) + 512 /* sorting scratch space */)
91  #define HUF_WORKSPACE_SIZE_U64 (HUF_WORKSPACE_SIZE / sizeof(U64))
92  HUF_PUBLIC_API size_t HUF_compress4X_wksp (void* dst, size_t dstCapacity,
93                                       const void* src, size_t srcSize,
94                                       unsigned maxSymbolValue, unsigned tableLog,
95                                       void* workSpace, size_t wkspSize);
96  
97  #endif   /* HUF_H_298734234 */
98  
99  /* ******************************************************************
100   *  WARNING !!
101   *  The following section contains advanced and experimental definitions
102   *  which shall never be used in the context of a dynamic library,
103   *  because they are not guaranteed to remain stable in the future.
104   *  Only consider them in association with static linking.
105   * *****************************************************************/
106  #if !defined(HUF_H_HUF_STATIC_LINKING_ONLY)
107  #define HUF_H_HUF_STATIC_LINKING_ONLY
108  
109  /* *** Dependencies *** */
110  #include "mem.h"   /* U32 */
111  #define FSE_STATIC_LINKING_ONLY
112  #include "fse.h"
113  
114  
115  /* *** Constants *** */
116  #define HUF_TABLELOG_MAX      12      /* max runtime value of tableLog (due to static allocation); can be modified up to HUF_TABLELOG_ABSOLUTEMAX */
117  #define HUF_TABLELOG_DEFAULT  11      /* default tableLog value when none specified */
118  #define HUF_SYMBOLVALUE_MAX  255
119  
120  #define HUF_TABLELOG_ABSOLUTEMAX  12  /* absolute limit of HUF_MAX_TABLELOG. Beyond that value, code does not work */
121  #if (HUF_TABLELOG_MAX > HUF_TABLELOG_ABSOLUTEMAX)
122  #  error "HUF_TABLELOG_MAX is too large !"
123  #endif
124  
125  
126  /* ****************************************
127  *  Static allocation
128  ******************************************/
129  /* HUF buffer bounds */
130  #define HUF_CTABLEBOUND 129
131  #define HUF_BLOCKBOUND(size) (size + (size>>8) + 8)   /* only true when incompressible is pre-filtered with fast heuristic */
132  #define HUF_COMPRESSBOUND(size) (HUF_CTABLEBOUND + HUF_BLOCKBOUND(size))   /* Macro version, useful for static allocation */
133  
134  /* static allocation of HUF's Compression Table */
135  /* this is a private definition, just exposed for allocation and strict aliasing purpose. never EVER access its members directly */
136  typedef size_t HUF_CElt;   /* consider it an incomplete type */
137  #define HUF_CTABLE_SIZE_ST(maxSymbolValue)   ((maxSymbolValue)+2)   /* Use tables of size_t, for proper alignment */
138  #define HUF_CTABLE_SIZE(maxSymbolValue)       (HUF_CTABLE_SIZE_ST(maxSymbolValue) * sizeof(size_t))
139  #define HUF_CREATE_STATIC_CTABLE(name, maxSymbolValue) \
140      HUF_CElt name[HUF_CTABLE_SIZE_ST(maxSymbolValue)] /* no final ; */
141  
142  /* static allocation of HUF's DTable */
143  typedef U32 HUF_DTable;
144  #define HUF_DTABLE_SIZE(maxTableLog)   (1 + (1<<(maxTableLog)))
145  #define HUF_CREATE_STATIC_DTABLEX1(DTable, maxTableLog) \
146          HUF_DTable DTable[HUF_DTABLE_SIZE((maxTableLog)-1)] = { ((U32)((maxTableLog)-1) * 0x01000001) }
147  #define HUF_CREATE_STATIC_DTABLEX2(DTable, maxTableLog) \
148          HUF_DTable DTable[HUF_DTABLE_SIZE(maxTableLog)] = { ((U32)(maxTableLog) * 0x01000001) }
149  
150  
151  /* ****************************************
152  *  Advanced decompression functions
153  ******************************************/
154  size_t HUF_decompress4X1 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< single-symbol decoder */
155  #ifndef HUF_FORCE_DECOMPRESS_X1
156  size_t HUF_decompress4X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< double-symbols decoder */
157  #endif
158  
159  size_t HUF_decompress4X_DCtx (HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< decodes RLE and uncompressed */
160  size_t HUF_decompress4X_hufOnly(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /*< considers RLE and uncompressed as errors */
161  size_t HUF_decompress4X_hufOnly_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize); /*< considers RLE and uncompressed as errors */
162  size_t HUF_decompress4X1_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< single-symbol decoder */
163  size_t HUF_decompress4X1_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize);   /*< single-symbol decoder */
164  #ifndef HUF_FORCE_DECOMPRESS_X1
165  size_t HUF_decompress4X2_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< double-symbols decoder */
166  size_t HUF_decompress4X2_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize);   /*< double-symbols decoder */
167  #endif
168  
169  
170  /* ****************************************
171   *  HUF detailed API
172   * ****************************************/
173  
174  /*! HUF_compress() does the following:
175   *  1. count symbol occurrence from source[] into table count[] using FSE_count() (exposed within "fse.h")
176   *  2. (optional) refine tableLog using HUF_optimalTableLog()
177   *  3. build Huffman table from count using HUF_buildCTable()
178   *  4. save Huffman table to memory buffer using HUF_writeCTable()
179   *  5. encode the data stream using HUF_compress4X_usingCTable()
180   *
181   *  The following API allows targeting specific sub-functions for advanced tasks.
182   *  For example, it's possible to compress several blocks using the same 'CTable',
183   *  or to save and regenerate 'CTable' using external methods.
184   */
185  unsigned HUF_optimalTableLog(unsigned maxTableLog, size_t srcSize, unsigned maxSymbolValue);
186  size_t HUF_buildCTable (HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue, unsigned maxNbBits);   /* @return : maxNbBits; CTable and count can overlap. In which case, CTable will overwrite count content */
187  size_t HUF_writeCTable (void* dst, size_t maxDstSize, const HUF_CElt* CTable, unsigned maxSymbolValue, unsigned huffLog);
188  size_t HUF_writeCTable_wksp(void* dst, size_t maxDstSize, const HUF_CElt* CTable, unsigned maxSymbolValue, unsigned huffLog, void* workspace, size_t workspaceSize);
189  size_t HUF_compress4X_usingCTable(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable);
190  size_t HUF_compress4X_usingCTable_bmi2(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable, int bmi2);
191  size_t HUF_estimateCompressedSize(const HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue);
192  int HUF_validateCTable(const HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue);
193  
194  typedef enum {
195     HUF_repeat_none,  /*< Cannot use the previous table */
196     HUF_repeat_check, /*< Can use the previous table but it must be checked. Note : The previous table must have been constructed by HUF_compress{1, 4}X_repeat */
197     HUF_repeat_valid  /*< Can use the previous table and it is assumed to be valid */
198   } HUF_repeat;
199  /* HUF_compress4X_repeat() :
200   *  Same as HUF_compress4X_wksp(), but considers using hufTable if *repeat != HUF_repeat_none.
201   *  If it uses hufTable it does not modify hufTable or repeat.
202   *  If it doesn't, it sets *repeat = HUF_repeat_none, and it sets hufTable to the table used.
203   *  If preferRepeat then the old table will always be used if valid.
204   *  If suspectUncompressible then some sampling checks will be run to potentially skip huffman coding */
205  size_t HUF_compress4X_repeat(void* dst, size_t dstSize,
206                         const void* src, size_t srcSize,
207                         unsigned maxSymbolValue, unsigned tableLog,
208                         void* workSpace, size_t wkspSize,    /*< `workSpace` must be aligned on 4-bytes boundaries, `wkspSize` must be >= HUF_WORKSPACE_SIZE */
209                         HUF_CElt* hufTable, HUF_repeat* repeat, int preferRepeat, int bmi2, unsigned suspectUncompressible);
210  
211  /* HUF_buildCTable_wksp() :
212   *  Same as HUF_buildCTable(), but using externally allocated scratch buffer.
213   * `workSpace` must be aligned on 4-bytes boundaries, and its size must be >= HUF_CTABLE_WORKSPACE_SIZE.
214   */
215  #define HUF_CTABLE_WORKSPACE_SIZE_U32 (2*HUF_SYMBOLVALUE_MAX +1 +1)
216  #define HUF_CTABLE_WORKSPACE_SIZE (HUF_CTABLE_WORKSPACE_SIZE_U32 * sizeof(unsigned))
217  size_t HUF_buildCTable_wksp (HUF_CElt* tree,
218                         const unsigned* count, U32 maxSymbolValue, U32 maxNbBits,
219                               void* workSpace, size_t wkspSize);
220  
221  /*! HUF_readStats() :
222   *  Read compact Huffman tree, saved by HUF_writeCTable().
223   * `huffWeight` is destination buffer.
224   * @return : size read from `src` , or an error Code .
225   *  Note : Needed by HUF_readCTable() and HUF_readDTableXn() . */
226  size_t HUF_readStats(BYTE* huffWeight, size_t hwSize,
227                       U32* rankStats, U32* nbSymbolsPtr, U32* tableLogPtr,
228                       const void* src, size_t srcSize);
229  
230  /*! HUF_readStats_wksp() :
231   * Same as HUF_readStats() but takes an external workspace which must be
232   * 4-byte aligned and its size must be >= HUF_READ_STATS_WORKSPACE_SIZE.
233   * If the CPU has BMI2 support, pass bmi2=1, otherwise pass bmi2=0.
234   */
235  #define HUF_READ_STATS_WORKSPACE_SIZE_U32 FSE_DECOMPRESS_WKSP_SIZE_U32(6, HUF_TABLELOG_MAX-1)
236  #define HUF_READ_STATS_WORKSPACE_SIZE (HUF_READ_STATS_WORKSPACE_SIZE_U32 * sizeof(unsigned))
237  size_t HUF_readStats_wksp(BYTE* huffWeight, size_t hwSize,
238                            U32* rankStats, U32* nbSymbolsPtr, U32* tableLogPtr,
239                            const void* src, size_t srcSize,
240                            void* workspace, size_t wkspSize,
241                            int bmi2);
242  
243  /* HUF_readCTable() :
244   *  Loading a CTable saved with HUF_writeCTable() */
245  size_t HUF_readCTable (HUF_CElt* CTable, unsigned* maxSymbolValuePtr, const void* src, size_t srcSize, unsigned *hasZeroWeights);
246  
247  /* HUF_getNbBitsFromCTable() :
248   *  Read nbBits from CTable symbolTable, for symbol `symbolValue` presumed <= HUF_SYMBOLVALUE_MAX
249   *  Note 1 : is not inlined, as HUF_CElt definition is private */
250  U32 HUF_getNbBitsFromCTable(const HUF_CElt* symbolTable, U32 symbolValue);
251  
252  /*
253   * HUF_decompress() does the following:
254   * 1. select the decompression algorithm (X1, X2) based on pre-computed heuristics
255   * 2. build Huffman table from save, using HUF_readDTableX?()
256   * 3. decode 1 or 4 segments in parallel using HUF_decompress?X?_usingDTable()
257   */
258  
259  /* HUF_selectDecoder() :
260   *  Tells which decoder is likely to decode faster,
261   *  based on a set of pre-computed metrics.
262   * @return : 0==HUF_decompress4X1, 1==HUF_decompress4X2 .
263   *  Assumption : 0 < dstSize <= 128 KB */
264  U32 HUF_selectDecoder (size_t dstSize, size_t cSrcSize);
265  
266  /*
267   *  The minimum workspace size for the `workSpace` used in
268   *  HUF_readDTableX1_wksp() and HUF_readDTableX2_wksp().
269   *
270   *  The space used depends on HUF_TABLELOG_MAX, ranging from ~1500 bytes when
271   *  HUF_TABLE_LOG_MAX=12 to ~1850 bytes when HUF_TABLE_LOG_MAX=15.
272   *  Buffer overflow errors may potentially occur if code modifications result in
273   *  a required workspace size greater than that specified in the following
274   *  macro.
275   */
276  #define HUF_DECOMPRESS_WORKSPACE_SIZE ((2 << 10) + (1 << 9))
277  #define HUF_DECOMPRESS_WORKSPACE_SIZE_U32 (HUF_DECOMPRESS_WORKSPACE_SIZE / sizeof(U32))
278  
279  #ifndef HUF_FORCE_DECOMPRESS_X2
280  size_t HUF_readDTableX1 (HUF_DTable* DTable, const void* src, size_t srcSize);
281  size_t HUF_readDTableX1_wksp (HUF_DTable* DTable, const void* src, size_t srcSize, void* workSpace, size_t wkspSize);
282  #endif
283  #ifndef HUF_FORCE_DECOMPRESS_X1
284  size_t HUF_readDTableX2 (HUF_DTable* DTable, const void* src, size_t srcSize);
285  size_t HUF_readDTableX2_wksp (HUF_DTable* DTable, const void* src, size_t srcSize, void* workSpace, size_t wkspSize);
286  #endif
287  
288  size_t HUF_decompress4X_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable);
289  #ifndef HUF_FORCE_DECOMPRESS_X2
290  size_t HUF_decompress4X1_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable);
291  #endif
292  #ifndef HUF_FORCE_DECOMPRESS_X1
293  size_t HUF_decompress4X2_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable);
294  #endif
295  
296  
297  /* ====================== */
298  /* single stream variants */
299  /* ====================== */
300  
301  size_t HUF_compress1X (void* dst, size_t dstSize, const void* src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog);
302  size_t HUF_compress1X_wksp (void* dst, size_t dstSize, const void* src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog, void* workSpace, size_t wkspSize);  /*< `workSpace` must be a table of at least HUF_WORKSPACE_SIZE_U64 U64 */
303  size_t HUF_compress1X_usingCTable(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable);
304  size_t HUF_compress1X_usingCTable_bmi2(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable, int bmi2);
305  /* HUF_compress1X_repeat() :
306   *  Same as HUF_compress1X_wksp(), but considers using hufTable if *repeat != HUF_repeat_none.
307   *  If it uses hufTable it does not modify hufTable or repeat.
308   *  If it doesn't, it sets *repeat = HUF_repeat_none, and it sets hufTable to the table used.
309   *  If preferRepeat then the old table will always be used if valid.
310   *  If suspectUncompressible then some sampling checks will be run to potentially skip huffman coding */
311  size_t HUF_compress1X_repeat(void* dst, size_t dstSize,
312                         const void* src, size_t srcSize,
313                         unsigned maxSymbolValue, unsigned tableLog,
314                         void* workSpace, size_t wkspSize,   /*< `workSpace` must be aligned on 4-bytes boundaries, `wkspSize` must be >= HUF_WORKSPACE_SIZE */
315                         HUF_CElt* hufTable, HUF_repeat* repeat, int preferRepeat, int bmi2, unsigned suspectUncompressible);
316  
317  size_t HUF_decompress1X1 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /* single-symbol decoder */
318  #ifndef HUF_FORCE_DECOMPRESS_X1
319  size_t HUF_decompress1X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /* double-symbol decoder */
320  #endif
321  
322  size_t HUF_decompress1X_DCtx (HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);
323  size_t HUF_decompress1X_DCtx_wksp (HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize);
324  #ifndef HUF_FORCE_DECOMPRESS_X2
325  size_t HUF_decompress1X1_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< single-symbol decoder */
326  size_t HUF_decompress1X1_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize);   /*< single-symbol decoder */
327  #endif
328  #ifndef HUF_FORCE_DECOMPRESS_X1
329  size_t HUF_decompress1X2_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);   /*< double-symbols decoder */
330  size_t HUF_decompress1X2_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize);   /*< double-symbols decoder */
331  #endif
332  
333  size_t HUF_decompress1X_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable);   /*< automatic selection of sing or double symbol decoder, based on DTable */
334  #ifndef HUF_FORCE_DECOMPRESS_X2
335  size_t HUF_decompress1X1_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable);
336  #endif
337  #ifndef HUF_FORCE_DECOMPRESS_X1
338  size_t HUF_decompress1X2_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable);
339  #endif
340  
341  /* BMI2 variants.
342   * If the CPU has BMI2 support, pass bmi2=1, otherwise pass bmi2=0.
343   */
344  size_t HUF_decompress1X_usingDTable_bmi2(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable, int bmi2);
345  #ifndef HUF_FORCE_DECOMPRESS_X2
346  size_t HUF_decompress1X1_DCtx_wksp_bmi2(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize, int bmi2);
347  #endif
348  size_t HUF_decompress4X_usingDTable_bmi2(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable, int bmi2);
349  size_t HUF_decompress4X_hufOnly_wksp_bmi2(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize, int bmi2);
350  #ifndef HUF_FORCE_DECOMPRESS_X2
351  size_t HUF_readDTableX1_wksp_bmi2(HUF_DTable* DTable, const void* src, size_t srcSize, void* workSpace, size_t wkspSize, int bmi2);
352  #endif
353  #ifndef HUF_FORCE_DECOMPRESS_X1
354  size_t HUF_readDTableX2_wksp_bmi2(HUF_DTable* DTable, const void* src, size_t srcSize, void* workSpace, size_t wkspSize, int bmi2);
355  #endif
356  
357  #endif /* HUF_STATIC_LINKING_ONLY */
358  
359